One vertex per element, one color per generator, with an edge from x to x·s.
(1,2)(3,8)(4,5)(6,15)(7,9)(10,12)(11,16)(13,14)(17,18,21,24)(19,25,27,22)(20,23,29,28)(26,31,32,30)(33,34,39,36)(35,37,40,42)(38,41,47,44)(43,45,48,46)(1,3,7,11)(2,8,9,16)(4,12,13,6)(5,10,14,15)(17,18)(19,22)(20,23)(21,24)(25,27)(26,30)(28,29)(31,32)(35,40)(37,42)(43,48)(45,46)(2,9)(3,11)(4,13)(10,15)(17,19,21,27)(18,22,24,25)(20,26,29,32)(23,30,28,31)(33,35)(34,37)(36,42)(38,43)(39,40)(41,45)(44,46)(47,48)(1,4)(2,5)(3,12)(6,11)(7,13)(8,10)(9,14)(15,16)(17,19)(18,22)(20,26)(21,27)(23,30)(24,25)(28,31)(29,32)(33,36,39,34)(35,42,40,37)(38,44,47,41)(43,46,48,45)(1,5)(2,4)(3,10)(6,16)(7,14)(8,12)(9,13)(11,15)(17,20,21,29)(18,23,24,28)(19,26,27,32)(22,30,25,31)(33,37,39,42)(34,40,36,35)(38,46,47,45)(41,43,44,48)(1,6,7,12)(2,10,9,15)(3,4,11,13)(5,8,14,16)(17,18)(19,22)(20,28)(21,24)(23,29)(25,27)(26,31)(30,32)(33,38)(34,41)(35,43)(36,44)(37,45)(39,47)(40,48)(42,46)A Cayley diagram is a choice, not a fact about the group. Another drawing of this group — in a book, or on a different generating set — may look nothing like this one.